A novel Z-scheme g-C₃N₄/LaCoO₃ photocatalyst was prepared by a facial mixing-heating and precipitation method. Doping g-C₃N₄ on LaCoO₃, the heterojunction exhibits excellent photocatalytic performance and stability compared with bare LaCoO₃ in the degradation of tetracycline hydrochloride (TC). The enhanced photocatalytic activity are attributed to the high separation efficiency of electron-hole pairs by the formation of Z-scheme heterojunction structure. The photocatalytic degradation rate of TC is up to 92% and the kinetic rate constant (k) of the optimal g-C₃N₄/LaCoO₃ composite is about 14.5 times and 2.3 times of that of bare LaCoO₃ and g-C₃N₄, respectively.

通过面部混合加热沉淀法制备了新型的Z-方案gC ₃ N ₄ / LaCoO ₃光催化剂。在LaCoO ₃上掺杂gC ₃ N ₄，与裸LaCoO ₃相比，异质结在四环素盐酸盐（TC）的降解中表现出优异的光催化性能和稳定性。通过形成Z-方案异质结结构，提高了光催化活性归因于电子-空穴对的高分离效率。TC的光催化降解率高达92％，最佳gC ₃ N ₄的动力学速率常数（k）/ LaCoO ₃复合材料分别约为裸LaCoO ₃和gC ₃ N _4的14.5倍和2.3倍。